Fuel transfer coupling

ABSTRACT

Provided herein are couplings useful in the transfer of liquid fuels from a remote storage reservoir to an on-board fuel tank of a motorized vehicle. There is provided a first coupling which is configured to be in fluid communication with the interior of a vehicle&#39;s fuel tank, and a second coupling which is intended to be in fluid communication with the contents of a remote fuel storage reservoir. The disclosure also includes a process for charging a fuel reservoir on board of a motorized vehicle from a remote reservoir, wherein the vapor in the fuel reservoir is displaced by an equal volume of fuel delivered from said remote reservoir, and wherein the vapor in said fuel reservoir is simultaneously caused to be transferred to said remote reservoir, thus permitting no escape of the vapor from said fuel reservoir to the surrounding atmosphere. Through use of the present disclosure, spills of fuel are essentially eliminated, and the escape of vapors from the vehicle&#39;s fuel tank are prevented, thus preventing atmospheric hydrocarbon pollution.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.12/287,508 filed Oct. 9, 2008 now U.S. Pat. No. 7,798,184, which was acontinuation of U.S. patent application Ser. No. 11/702,414 filed Feb.6, 2007, now abandoned, which was a divisional of U.S. patentapplication Ser. No. 10/727,279 filed Dec. 3, 2003 (now U.S. Pat. No.7,182,098), and claims the benefit of U.S. Provisional Application No.60/432,162 filed Dec. 10, 2002, the entire contents of all of which areherein fully incorporated by reference.

TECHNICAL FIELD

This disclosure relates generally to couplings used in transferring aliquid substance from one reservoir in which a liquid is stored to asecond reservoir. More particularly, the disclosure relates in oneembodiment to couplings useful in transferring a liquid hydrocarbon fuelfrom a storage vessel to an on-board fuel tank inside a motorizedvehicle, such as an automobile.

BACKGROUND

By the very nature of the utilization of liquid substances such asliquid hydrocarbon fuels, it is frequently necessary to transfer aliquid fuel from a first storage vessel in which it is contained to asecond storage vessel. One particular instance in which it is necessaryto so transfer a liquid fuel is in the case of re-fueling an automobileduring a racing event.

One particular class of automobile racing is where competing vehiclesmust travel an extended period of time to cover the pre-determineddistance of the race. Such automobile races have been known since theadvent of the automobile itself, and current NASCAR and other eventsinclude such races as the Indianapolis 500, the California 500, theVirginia 500, New England 300, to name but a few. Such automobile racestypically require drivers and their cars to travel hundreds of milesfrom start to finish. Quite often, such races are carried out on atrack, which may be circular, oval, or which may trace out a serpentinecourse.

Since the fuel-carrying capacity of the race car is limited by the rulesof racing to be of specific volume, and the capacity of such tanks isnot sufficient to enable the racer to complete the entire race on asingle tank load of fuel, it is a general requirement of modernautomobile racing that drivers must stop their vehicles periodically tohave their tanks re-charged with fuel. Since the nature of racing issuch that the first racer to cross the finish line is generally declaredthe winner, the amount of time used for the combined re-fuelingoperations becomes a significant factor in determining the outcome ofany given race. Hence, it is essential from the standpoint of the racingteam that the time utilized in re-fueling and other pit-stop operationsis kept to an absolute minimum.

The current state-of-the-art method for re-fueling a racing vehicle in acircle-track application is for the racer to pull their car into an areaknown to those skilled in the art as the “pit-stop” for servicing. As iscustomary, the on-board fuel tank of a racing vehicle includes an inletconduit through which fuel is admitted to the tank during re-fueling.There is also an exit conduit through which fuel is exited from the fueltank and delivered by means of a fuel pump to the engine. There is alsoa cap or other means of sealing the inlet conduit from the surroundingenvironment after a re-fueling of the vehicle is complete. There is aheadspace volume above the liquid level of the fuel in the tank.Initially, when the tank is full, the headspace volume is at itsminimum. As fuel is consumed, the headspace volume increases, andreaches its maximum when all of the liquid fuel formerly contained inthe tank has been consumed.

It is through the inlet conduit of the fuel tank that fuel is admittedduring a pit-stop re-fueling operation. During a re-fueling, a member ofthe pit crew carries a large funnel-shaped vessel (the “rechargingtank”) which is full of a motor fuel, such as a gasoline. The rechargingtank includes a fitting on its lower extremity which is complementary tothat on the end of the inlet conduit on the fuel tank that receivesfuel. After the racer's vehicle comes to a stop, the pit crew willremove the cap from the fuel tank inlet conduit. Then, the fitting onthe recharging tank is mated to the fitting on the inlet conduit to forma sealed conduit through which fuel may pass from the recharging tank tothe on-board fuel tank of the race car. A valve disposed on therecharging tank is opened, and fuel contained within the recharging tankis caused to flow, by the force of gravity, from the recharging tankinto the on-board fuel tank of the racing vehicle.

The re-fueling of a racing vehicle is undertaken in as quick a time asseems possible, and with minimizing the losses of fuel during theoperation. However, one of the disadvantages of current re-fuelingmethods is that large volumes of gasoline are spilled onto the pavementand portions of the vehicle being re-fueled. A typical volume of fuellost by spillage in re-fueling operations during the course of a racemay be several gallons of fuel, which losses occur primarily when therecharging tank is removed from the inlet conduit. While pit crews arewell-equipped to deal with inadvertent fires that may occasionallyoccur, there are immediate health risks to pit crew personnel other thanthe fire hazard. For example, modern racing engines are typicallydesigned to have an effective compression ratio in excess of 10:1, andthese high compression ratio engines require fuels having high octaneratings. Volatile anti-knock compounds such as tetraethyl lead and thelike are formulated into racing fuels as octane boosters. Since theselead compounds are volatile and since they are known health hazards, theissue of inhalation of tetraethyl lead and related compounds as a healthhazard to pit crews is a serious matter. In addition, any un-necessaryrelease of raw hydrocarbon fuels into the atmosphere is a public healthconcern as well. While professional racing has enjoyed exemption frommany regulations applicable to automobiles driven on public roads, thereexists a need in the art to minimize fuel spillage, while maintainingthe rapidity at which a fuel tank on a racing vehicle may be re-filled.

Another issue for automobiles is the concept of vapor lock. Vapor lockis a condition which is manifest by the pressure in the headspace abovethe fuel in an on-board fuel tank being lower than normal atmosphericpressure. Such a condition is caused to exist by virtue of the fuel pumpremoving fuel from the fuel tank, without the same volume of air beingadmitted into the tank to compensate for the lost volume of fuel becausethe fuel tank is sealed off from the atmosphere. Eventually, the fuelpump is required to pump fuel from an area of reduced pressure, and, notbeing designed for such use, a less-than-desired amount of fuel isdelivered to the engine, which results in inhibited engine performance.

SUMMARY OF THE DISCLOSURE

The present disclosure provides a fuel transfer coupling for attachmentto the inlet pipe of a vehicle's fuel tank which comprises a baseportion which comprises a planar top surface and which comprises acentral bore portion having a first end portion and a second endportion, wherein the central bore portion is surrounded by a shroudingenclosure, wherein the shrouding enclosure includes a vapor tube,wherein the shrouding enclosure is in fluid communication with aplurality of holes disposed on the planar top surface, thus providingfluid communication between the holes and the vapor tube, the baseportion further including a circumferential ledge at the terminus of thesecond end portion within the base portion, and wherein the base portionfurther comprises a flange disposed about its periphery, the flangeincluding a plurality of holes in its surface. There is a flow controlcone having an adjacent wall, the flow control cone including a springseat, a poppet guide bore, an outer ring portion, and a wall portion,wherein the flow control cone is disposed at the second end portion ofthe central bore portion with its outer ring in contact with thecircumferential ledge, thus forming a circumferential slot between theadjacent wall and the wall portion of the flow control cone. There is apoppet having a flat top surface, a bottom surface, and a stem, whereinthe stem is slidably disposed within the poppet guide bore, the poppetfurther comprising a vent disc centrally disposed on the flat topsurface, wherein the vent disc is mechanically biased towards the flattop surface. There is a spring disposed between the spring seat and thebottom surface of the poppet. There is a hollow internal housing havinga flat top surface and a skirt portion, the internal housing beingdisposed about the poppet and wherein the the skirt of the internalhousing is slidably disposed within the circumferential slot. There isan adapter cover affixed to the base portion, in which is contained theflow control cone, the poppet, the spring, and the internal housing,wherein the adapter cover further includes a substantiallycylindrically-shaped outer wall portion and a flange comprising aplurality of holes for fastening the flange of the cover to the flangeof the base portion.

The disclosure also provides an automobile including a fuel tank havingan inlet pipe and further comprising the coupling described abovewherein the vapor tube is in effective fluid contact with the headspaceabove the fuel in the fuel tank and wherein the first end portion of thecentral bore portion is in effective fluid contact with the inlet pipe.

The disclosure also provides a fuel transfer coupling for attachment toa source of fuel to be delivered to a vehicle's fuel tank whichcomprises a base portion which comprises a raised surface and whichcomprises a central conduit portion having a top end portion and abottom end portion, wherein the central conduit portion is surrounded bya shrouding enclosure, wherein the shrouding enclosure includes a vaportube and wherein the shrouding enclosure is in fluid communication witha plurality of holes disposed on the raised surface, thus providingfluid communication between the holes and the vapor tube. The baseportion further includes a flange disposed about its periphery, theflange including a plurality of holes in its surface. There is a bosscentrally located within the central conduit portion, that receives andrigidly holds in place a fastener means. There is a spring disposedabout the top end portion of the central conduit portion. There is acollar/seal ring assembly which itself comprises:

i) a moveable collar shaped substantially in the form of a cylindricalsleeve having a top portion, a bottom portion, and a circumferentialwall and comprising a plurality of slots in its wall; and ii) a sealring having a flat top surface and being disposed within the inner spacedefined by the wall of the moveable collar, being held in positiontherein by means of a plurality of equatorially-located protrusionsextending from the seal ring into the plurality of slots on the moveablecollar, the plurality of slots further including springs formechanically biasing the seal ring in a direction towards the topportion of the moveable collar in which it is disposed. The collar/sealring assembly is in contact with the spring. There is also a valvecenter having a flat top portion and a stem portion having a tip,wherein the tip of the valve center includes a means for receiving afastener means, wherein the means for receiving a fastener means ismechanically engaged with the fastener means in the boss. There is alsoan adapter cover shaped substantially in the form of a cylindricalsleeve affixed to the base portion, in which is contained the spring,the collar/seal ring assembly, and the valve center, wherein the adaptercover includes a smooth bore in its inner wall, and wherein the bottomincludes a plurality of holes for fastening the cover to the flange ofthe base portion.

In another aspect, the present disclosure comprises a quick-detach fueltransfer coupling through which a liquid fuel may pass from a remotecharging reservoir to a vehicle's on-board fuel tank which comprises anon-board portion having an inlet end and a discharge end, wherein thedischarge end is in fluid communication with the inlet pipe of avehicle's on-board fuel tank. The on-board portion comprises asubstantially-cylindrically shaped first adapter portion comprising anouter wall disposed about a central bore, and the outer wall has acentral axis. There is a means for permitting a liquid fuel to pass intothe fuel tank via a path which is annularly disposed about the centralaxis. There is also a means for permitting vapor from within the fueltank to exit the fuel tank via a path which is annularly disposed aboutthe central axis. There is a remote portion having an inlet end and adischarge end, and the inlet end is in fluid communication with thecontents of a remote charging reservoir. The remote portion comprises asubstantially-cylindrically shaped second adapter portion comprising asmooth bore disposed about a central bore, and the smooth bore has acentral axis. There is a means for permitting flow of a liquid fuel fromthe remote charging reservoir to the on-board portion upon placement ofthe smooth bore over the outer wall via a path which is annularlydisposed about the central axis. There is a means for permitting vaporfrom within the fuel tank to enter the remote charging reservoir via apath which is annularly disposed about the central axis. In this aspectof the disclosure, it is preferred that the central axis of said firstadapter coincides substantially with said central axis of said secondadapter.

BRIEF DESCRIPTION OF THE DRAWINGS

In the annexed drawings:

FIG. 1 shows a an exploded perspective view of the on-board portion of afuel coupling according to one form of the disclosure;

FIG. 2 shows a perspective view of the male adapter base portion of theon-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 3 shows an overhead view of the male adapter base portion of theon-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 4 shows a perspective view of the male adapter cover of theon-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 5 shows a side elevation view of the male adapter cover of theon-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 6 shows a bottom view of the male adapter cover of the on-boardportion of a fuel coupling according to one form of the disclosure;

FIG. 7 shows a perspective view of the internal housing portion of anon-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 8 shows a side elevation view of the internal housing portion of anon-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 9 shows a perspective view of a flow control cone element of anon-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 10 shows a side-elevation view of a flow control cone element of anon-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 11 shows an overhead view of a flow control cone element of anon-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 12 shows a perspective view of the bottom side of a flow controlcone element of an on-board portion of a fuel coupling according to oneform of the disclosure;

FIG. 13 a shows a perspective view of the upper portion of a poppetelement of an on-board portion of a fuel coupling according to one formof the disclosure;

FIG. 13 b shows a side elevation view of the upper portion of a poppetelement of an on-board portion of a fuel coupling according to one formof the disclosure;

FIG. 14 shows a perspective view of the bottom side of a poppet elementof an on-board portion of a fuel coupling according to one form of thedisclosure;

FIG. 15 shows a bottom view of a poppet element of an on-board portionof a fuel coupling according to one form of the disclosure;

FIG. 16 shows a side view of the assembled male adapter portion(“on-board portion”) of a coupling pair according to the disclosure;

FIG. 17 shows top view of the assembled male adapter portion of acoupling pair according to the disclosure;

FIG. 18 shows a perspective view of the top portion of an assembled maleadapter portion of a coupling pair according to the disclosure;

FIG. 19 shows a perspective view of the underside portion of anassembled male adapter portion of a coupling pair according to thedisclosure;

FIG. 20 shows a perspective view of the underside portion of anassembled male adapter portion of a coupling pair according to thedisclosure;

FIG. 21 shows perspective view of the top portion of an assembled maleadapter portion of a coupling pair according to the disclosure;

FIG. 22 shows a bottom view of an assembled male adapter portion of acoupling pair according to the disclosure;

FIG. 23 shows an exploded perspective view of the remote (or “female”)portion of a fuel coupling according to one form of the disclosure;

FIG. 24 shows a side elevation view of the female adapter base portionof the remote portion of a fuel coupling according to one form of thedisclosure;

FIG. 25 shows a perspective view of the upper portion of the femaleadapter base portion of the remote portion of a fuel coupling accordingto one form of the disclosure;

FIG. 26 shows a top view of the female adapter base portion of theremote portion of a fuel coupling according to one form of thedisclosure;

FIG. 27 shows a perspective view of a female adapter cover portion ofthe remote portion of a fuel coupling according to one form of thedisclosure;

FIG. 28 shows a top view of the female adapter cover portion of theremote portion of a fuel coupling according to one form of thedisclosure;

FIG. 29 shows a bottom view of the female adapter cover portion of theremote portion of a fuel coupling according to one form of thedisclosure;

FIG. 30 a shows a perspective view of the moveable collar portion of theremote portion of a fuel coupling according to one form of thedisclosure;

FIG. 30 b shows a side elevation view of the moveable collar portion ofthe remote portion of a fuel coupling according to one form of thedisclosure;

FIG. 31 shows an overhead view of the moveable collar portion of theremote portion of a fuel coupling according to one form of thedisclosure;

FIG. 32 shows a bottom view of the moveable collar portion of the remoteportion of a fuel coupling according to one form of the disclosure;

FIG. 33 shows a perspective view of the bottom portion of the moveablecollar portion of the remote portion of a fuel coupling according to oneform of the disclosure;

FIG. 34 shows a perspective view of the seal ring element of the remoteportion of a fuel coupling according to one form of the disclosure;

FIG. 35 shows a side elevation view of the seal ring element of theremote portion of a fuel coupling according to one form of thedisclosure;

FIG. 36 shows an overhead view of the seal ring element of the remoteportion of a fuel coupling according to one form of the disclosure;

FIG. 37 shows a perspective view of the assembled collar/seal ringassembly element combination of the remote portion of a fuel couplingaccording to one form of the disclosure;

FIG. 38 shows a side elevation view of the assembled collar/seal ringassembly element combination of the remote portion of a fuel couplingaccording to one form of the disclosure;

FIG. 39 shows an overhead view of the assembled collar/seal ringassembly element combination of the remote portion of a fuel couplingaccording to one form of the disclosure;

FIG. 40 a shows a top view of the valve center element of the remoteportion of a fuel coupling according to one form of the disclosure;

FIG. 40B shows a bottom perspective view of the remote portion of a fuelcoupling according to one form of the disclosure;

FIG. 40C shows a side elevation view of the remote portion of a fuelcoupling according to one form of the disclosure;

FIG. 41 shows a side view of the assembled female adapter portion of acoupling pair according to the disclosure;

FIG. 42 shows a bottom view of the assembled female adapter portion of acoupling pair according to the disclosure;

FIG. 43 shows a top view of the assembled female adapter portion of acoupling pair according to the disclosure;

FIG. 44 shows a perspective view of the inside of the top portion of anassembled female adapter portion of a coupling pair according to thedisclosure;

FIG. 45 shows a perspective view of the inside of the top portion of anassembled female adapter portion of a coupling pair according to thedisclosure;

FIG. 46 a-f shows a cross sectional view of a coupling pair according toa preferred form of the disclosure, at various stages of coupling andde-coupling of the pair encountered during a typical refuelingoperation;

FIG. 47 shows a perspective view of a fuel reservoir having a couplingaccording to one form of the disclosure attached thereto; and

FIG. 48 shows a perspective view of a remote fuel reservoir having acoupling according to one form of the disclosure attached thereto.

DETAILED DESCRIPTION

A fuel transfer coupling according to the present disclosure comprisesan on-board portion which is in fluid contact with the gasoline tank ona motorized vehicle such as a race car, and a remote portion which is influid contact with a source of liquid hydrocarbon fuel that is to bedelivered to the gasoline tank of the motorized vehicle. The on-boardportion may be referred to as the male adapter and the remote portion ofthe coupling may be referred to as the female adapter, for convenience.

Referring to the drawings, and initially to FIG. 1 there is shown theon-board portion of a fuel transfer coupling according to the disclosurein an exploded view, including all of its various components, which aredescribed forthwith.

In FIG. 2 is shown a perspective view of the male adapter base 4. Themale adapter base 4 includes a central bore 34 through which fuel isintended to flow. The central bore 34 has a first end portion which maybe connected to the inlet pipe of a fuel tank, and a second end portionwhich extends into said adapter base and terminates at a point withinthe male adapter base. Disposed about the central bore 34 is a shroudingenclosure 36 which forms an envelope around the central bore portion 34for the purpose of allowing the travel of gas or air vapor through thevarious holes 33 disposed in the planar top surface 40 of the maleadapter base, wherein the holes 33 are in fluid contact with the outletportion 35 of the vapor tube 20. Thus, this assembly is similar to acondenser as used in the chemical arts, which consists of a tube havinga water jacket about it, with an inlet and outlet for the cooling water,and a tube disposed therethrough which the vapor to be condensed iscaused to pass. In the present instance, the central bore 34 issurrounded by the shrouding enclosure 36, which has as its “inlet”, thevarious holes 33, and which has as its “outlet”, the vapor tube 20.There is a planar flange portion 42 having a plurality of holes 44disposed through it along its periphery for the purpose of fastening themale adapter base to other components of this portion of the coupling.The plane of the flange portion 42 is slightly below the plane of thetop surface 40, and at the point of intersection of these two featuresthere is thus caused to exist an elevation 38, upon which an o-ring sealmay be mounted for sealing the surfaces in the finished assembly. Thereis a circumferential ledge 37 onto which a flow cone 58 is mounted, asis described later herein. The wall W of the bore above thecircumferential ledge 37 is also shown.

In FIG. 3 is shown an overhead view of the male adapter base 4,including the central bore 34 flange 42, holes 44, vapor tube 20, holes33, circumferential ledge 37, and o-ring seal 46 in its location at theelevation at 38 as shown in FIG. 2.

FIG. 4 shows a perspective view of the male adapter cover 2, having anouter wall 24, top surface 3, and flange portion 26, wherein the flangeportion 26 includes a plurality of holes 28 disposed along its peripheryfor connection to the male adapter base 4 once all of the componentshave been properly assembled, using conventional fasteners. There isalso a beveled edge 30, which is shown in FIG. 6 as well.

FIG. 5 shows a side elevation view of the male adapter cover 2,including outer wall 24 and flange 26.

FIG. 6 shows a bottom view of the male adapter cover 2, including itsflange 26, plurality of holes 28, annular groove 19 which extends aboutthe hole 1 adjacent to the flange 26 and receives the o-ring seal 46 ina sealing relationship in the completed assembly. There is also abeveled edge 30.

FIG. 7 shows the internal housing 18, which is reminiscent of a hollowshell having an open top portion T and an open bottom portion B, and ahollow interior space within the confines of its walls. There is a flattop surface 48, a sloping shoulder portion 49 which includes an o-ringseal 50, which o-ring seal 5 is disposed to seal between the slopingshoulder 49 and the beveled edge 30 from FIGS. 4 and 6 previously. Thereis also an o-ring seal 52 disposed along the bottom skirt portion 51 aswell, for sealing the skirt portion 51 against the wall portion W of thebore in FIG. 2. Thus, the skirt portion 51 of the internal housing 18 isslidably disposed within a circumferential slot which is defined by thewall W that is adjacent to the circumferential ledge 37 and the wallportion 64 of the flow control cone 6 when the flow control cone is inits position on the circumferential ledge 37. The skirt portion 51provides a travel stop against planar top surface 40.

FIG. 8 shows a side elevation view of the internal housing 18 anddepicts the locations of the top surface 48, sloping shoulder 49, o-ringseal 50, skirt 51, and o-ring seal 52.

FIG. 9 shows a perspective view of the flow control cone 6 component.The flow control cone 6 includes a funnel-shaped cone element 58, whichis held rigidly in place in the center of an outer ring 62 (which has awall portion 64) by means of cone supports 60 which are welded orotherwise attached by known conventional means, such as integralcasting, etc., to the cone and inner portion of the wall portion 64 ofthe outer ring 62. There is also a poppet guide bore 54 disposed at theapex of the cone, and a space 59 disposed between the cone 58 and theouter ring 62.

FIG. 10 is a side elevation view of the flow control cone 6 showing thecone 58, wall portion 64, and the outer ring 62. The cone supports 60are also shown.

FIG. 11 shows a bottom view of the flow control cone 6 showing thepoppet guide bore 54, wall portion 64, outer ring 62, cone supports 60,space 59, and cone 58. The diameter of the wall portion is slightly lessthan that of the internal diameter of the bottom portion B of theinternal housing 18 shown in FIG. 7, which enables the skirt portion 51of the internal housing to reside atop the outer ring 62 of the flowcontrol cone 6 after the flow control cone 6 has been placed in positionon the circumferential ledge 37 of FIG. 2.

FIG. 12 shows a perspective view of the top of the flow control cone 6including the poppet guide bore 54 having an outer wall 56. There is aflat portion 57 which serves as the seat for the poppet spring 8 (FIG.1). Also shown is cone 58, cone supports 60, outer ring 62, and wallportion 64.

FIG. 13A shows a perspective view of the upper portion of the poppet 10which includes a flat top surface 70, and an O-ring seal 72 disposed onthe upper shoulder 80 (FIG. 13B). There is a poppet stem 68 which ispreferably of a tri-lobe cross-section as later shown. There is a ventdisc 14 disposed in a recess in the face of the flat top surface 70,which is held in place by retainer ring 16, which retainer ring 16 isheld in position by means of machine screws threaded through the flattop surface. The vent disc 14 in one embodiment includes a hole 15 thatpasses through the vent disc. The spring 12 mechanically biases the disc14 onto its seat. According to an alternate form of the disclosure, thehole 15 may be disposed through the wall of the male adapter cover 2.

FIG. 13B is a side elevation view of the poppet 10, showing the uppershoulder 80 of the poppet 10, lower shoulder 81 of the poppet 10, o-ringseal 72, and poppet stem 68.

FIG. 14 shows a perspective view of the underside of the poppet 10 whichincludes the lower shoulder 81, flat bottom surface 83, o-ring seal 72,vent disc 14 having hole 15, spring 12, machine screw bottoms 78, poppetstem 68, and stem supports 69. The spring 12 is disposed between thevent disc 14 and the poppet stem 68 so as to maintain a mechanical biason the vent disc 14 in a direction towards the flat top surface 70 fromFIG. 13A.

FIG. 15 shows a bottom view of the poppet 10 including the stem supports49, poppet stem 68, vent disc 14, lower shoulder 81, and flat bottomsurface 83. The circle labeled D1 is of such a diameter as to be justslightly larger than the diameter D2 of the top portion of the cone 58(FIG. 10) so that the skirt of the poppet 81 lines up with the topportion of the cone 58 to promote a smooth fuel flow. The poppet stem 68is of such diameter as to form a snug fit which allows in and out motionof the poppet within the poppet guide bore 54.

FIG. 16 shows a side view of the male adapter 700 in its final assembledform, when all of the components shown in FIG. 1 and as previouslydescribed herein are contained within the male adapter cover 2 and themale adapter base in their proper design configuration. To assemble themale adapter 700, one begins by placing the male adapter base 4 on aflat surface. Next, the flow cone 6 is placed into position so that theouter ring 62 of the flow cone 6 rests on the circumferential ledge 37,so that the poppet spring seat 57 is facing upwards, as shown in FIG. 1.Next, the poppet 10 (including the spring 12, vent disc 14, andretaining ring 16) is inserted into the internal housing 18 from thebottom B (FIG. 8) so that the o-ring seal 72 contacts the inner wall ofthe internal housing 18 at a location on the interior of the slopingshoulder 49, which is a bevel 99 shown in FIG. 7 that extends around theinner circumference of the internal housing so as to completely contactthe o-ring seal 72. Next, the poppet spring 8 is placed on the springseat 57, and the internal housing 18 (with poppet 10 inside it) is thenplaced into position so that the skirt portion 51 rests atop the outerring portion 62 of the flow control cone 6, against the pressure of thepoppet spring. Finally, the male adapter cover 2 is placed over theinternal housing and the fasteners are secured to connect the flanges onthe male adapter cover 2 and the male adapter base 4, to provide theassembled male adapter 700 as shown in FIG. 16.

FIG. 17 shows a top view of the assembled male adapter 700, showing therespective positions of the vent disc 14, vent hole 15, retaining ring16, vapor tube 20, flange 26, flat top surface 48 of the internalhousing 18, flat top surface 70 of the poppet 10, top surface 3 of themale adapter cover 2 (FIG. 4), and the important gap 7 between the outerperimeter of the flat top surface 48 of the internal housing 18 and theinner perimeter of the top surface 3 of the male adapter cover 2. Thegap 7 is important, as it is through this gap that air passes during arefueling operation, to allow the escape of headspace air in the fueltank to compensate for the volume of fuel delivered during the refuelingoperation. As the flat top surface 70 of the poppet is depressedslightly, at first, against the pressure of the poppet spring 8, boththe poppet 10 and the internal housing 18 move into the assembly as awhole, until the skirt portion 51 has bottomed out against the face 40of the body 4. The movement of the internal housing 18 to its bottomedout position opens a space in the gap at 7 between the inner wall of themale adapter 2 and the internal housing 18 by releasing the contactbetween the o-ring seal 50 and the beveled edge 30. This slightdepressing of the flat top surface 48 of the internal housing 18 causesa fluid connection to exist between the vapor tube 20 and the gap 7 atthe top portion of the assembly where the o-ring seal 50 has separatedfrom the beveled edge 30, through the plurality of holes 33 in the maleadapter base 4.

Further depressing of the flat top surface 70 of the poppet 10 opens aspace S between the outer periphery of the top surface 70 of the poppet10 and the internal wall of the internal housing 18, as shown in FIG.18, thus enabling a liquid fuel to pass through the inner volume of theinternal housing, through the open space 59 in the flow control cone 6and through the central bore 34, which is connected to the inlet pipe onthe vehicle's fuel tank. The vapor tube 20 is connected to a hose whichis in fluid contact with the headspace gas within the fuel tank. Thus,by depressing the flat top surface 70 of the poppet 10, a fluidcommunication between the headspace gas in the fuel tank and the gap at7 is first caused, and secondly a pathway is opened to the fuel tank forfuel to flow in through central bore 34, from a location at the top ofthe poppet in the closed condition. This is because the poppet spring 8biases the poppet upwards; however, the poppet 10 is located within theinternal housing 18 but the head of the poppet has a larger diameterthan the diameter of the beveled edge 99 just beneath the top surface 48of the internal housing 18 in which it is contained, which thus alsocauses the internal housing 18 to be biased upwards. The internalhousing 18 is held in position within the male adapter cover 2 becausethe diameter of the sloping shoulder 49 of the inner housing 18 islarger than that of the beveled edge 30 in the male adapter cover. Thisis why the male adapter assembly 700 can only be assembled as taughtherein.

FIG. 19 shows the underside view of the male adapter assembly 700 whenthe poppet 10 is not depressed, and FIG. 20 shows the underside view ofthe assembly 700 while the poppet 10 is depressed, showing the movementof the poppet stem 69 with respect to the outer wall 56. FIG. 21 is atop perspective view of the male adapter assembly 700, and FIG. 22 is abottom view of the male adapter assembly 700.

A fuel transfer coupling according to the present disclosure comprises aremote portion which is in fluid contact with a source of liquidhydrocarbon fuel that is to be delivered to the gasoline tank of themotorized vehicle. The remote portion may be thought of as a femaleadapter owing to its being able to receive the male portion of thecoupling already described herein. The female adapter, in one preferredform of the disclosure, is preferably disposed at the exit point of afuel from a portable, remote fuel reservoir.

Referring to the drawings, and particularly to FIG. 23 there is shownthe remote portion of a fuel transfer coupling according to thedisclosure in an exploded view, including all of its various components,which are described forthwith.

FIG. 24 shows a side elevation view of a female adapter base 164according to the disclosure, including the top portion of the centralconduit 166T, bottom portion of the central conduit 166B, shroudingenclosure 170 vapor tube 172, o-ring seal 168, and raised surface 171.

FIG. 25 shows a perspective view of the upper portion of the femaleadapter base 164 according to the disclosure, including the raisedsurface 171, shrouding enclosure 170, outer flange 180 having aplurality of holes 182 disposed thereon, holes 174, vapor tube 172, topportion of the central conduit 166T having a flat top surface 184,o-ring seal 168, and a retaining fastener 176 disposed in a boss 177held centrally within the interior of the central conduit by means of aplurality of fastener boss supports 178, which are affixed to the innersurface of the wall of the central conduit by conventional means, suchas a weld. Retaining fastener 176 is shown with its threads visible.

FIG. 26 shows a top view of the female adapter base 164 according to thedisclosure, including the central conduit, raised surface 171, holes174, vapor tube 172, top surface 184, flange 180, holes 182, fastenerboss supports 178 and retaining fastener 176. Thus, the female adapterbase 164 includes a central conduit 166 through which fuel is intendedto flow. Disposed about the central conduit is a shrouding enclosure 170which forms an envelope around the central conduit for the purpose ofallowing the travel of gas or air vapor through the various holes 174disposed in the raised surface 171 of the female adapter base, whereinthe holes 174 are in fluid contact with the outlet portion 187 of thevapor tube 172. Thus, this assembly is similar to a condenser as used inthe chemical arts, which consists of a tube having a water jacket aboutit, with an inlet and outlet for the cooling water, and a tube disposedtherethrough which the vapor to be condensed is caused to pass. In thepresent instance, the central conduit is surrounded by the shroudingenclosure 170, which has as its “inlet”, the various holes 174, andwhich has as its “outlet”, the vapor tube 172.

FIG. 27 shows a perspective view of a female adapter cover 144 accordingto the present disclosure, which is shaped in the form of a hollowcylindrical shell, reminiscent of a cylinder sleeve. The female adaptercover includes a smooth bore 196 along its length dimension, except fora raised band 194 at the top, which raised band has a slightly lessinner diameter than the smooth bore 196. There is an o-ring seal 148which is disposed in an annular slot at the upper end of the femaleadapter cover, which o-ring provides a seal around the outer surface ofthe male adapter cover 2 when the male adapter cover is inserted intothe female adapter cover 144. There is a top surface 146 and a flaredbottom 150.

FIG. 28 shows a top view of the female adapter cover 144, including thetop surface 146 and the o-ring seal 148.

FIG. 29 shows a bottom view of the female adapter cover 144, includingflared bottom 150 and a plurality of threaded holes 152 disposedcircumferentially about the lower flared portion, which holes receive afastener that also passes through the holes 182 in the female adapterbase 164, which are in the same configuration and spacing on both thefemale adapter cover 144 and female adapter base 164. The diameter D3 ofthe inner bore 196 of the female adapter cover 144 is just slightlylarger than the diameter of the raised surface 171, so that the femaleadapter cover 144 may be securely fit over the female adapter base 164.

FIG. 30 a shows a moveable collar 102 according to the presentdisclosure, which is shaped as a hollow cylinder. The moveable collar102 is intended to be slidably disposed within the smooth bore 196 ofthe female adapter cover 144. The moveable collar 102 includes a groove108 in which is housed an o-ring seal 130, which o-ring seals the outersurface of the moveable collar 102 within the smooth bore 196 of thefemale adapter cover 144. There is a flat top surface 106, and aplurality of slots 104 which pass through the wall of the moveablecollar and may thus be regarded as holes. On the inside wall of themoveable collar 102, there is a flat recessed surface 112 that isdisposed between beveled edge 114 and bevel 110. Surface 113 extendsannularly about the inside diameter of the moveable collar 102, and hasitself an inside diameter which is smaller than the inside diameter ofthe flat recessed surface 112. The surface 115 extends annularly aboutthe inside diameter of the moveable collar 102 and has its own insidediameter which is less than that of surface 113. Thus, going fromsurface 113 to surface 112, there is a bevel 110. Then, going fromsurface 112 to surface 115, there is a beveled edge 114.

FIG. 30 b shows a side elevation view of the moveable collar 102 elementof the disclosure, including the slots 104, flat top surface 106, andgroove 108.

FIG. 31 is a top view of the moveable collar 102 element of thedisclosure, including the flat top surface 106.

FIG. 32 shows a bottom view of the moveable collar 102 element of thedisclosure, including the beveled edge 114 and holes 117 which aredrilled from the bottom surface of the moveable collar to the floorportion of each of the slots 104, so as to enable insertion of springsinto the holes 117.

FIG. 33 shows a perspective view of the bottom of the moveable collar102, including the slots 104 and groove 108. There is also shown surface115, beveled edge 114, holes 117, surface 112, surface 113, flat surface119, wall 203, and flat surface 201. The flat surface 119 accommodates aretaining ring 190 (FIG. 23) having same diameter as said flat surface119, to retain in their position springs which have been placed into theholes 117. The springs are then held in place by a retaining ringfastened to flat surface 119, either by interference fit, an adhesivesubstance, or other conventional means. There is also a flat bottomsurface 201.

FIG. 34 shows a seal ring 116 element of the disclosure, which ispreferably metallic in construction, as are all of the other elements ofthe couplings of the present disclosure. The seal ring includes a hollowinterior space 207. There is a flat top surface 118 which includes ano-ring seal embedded in an annular groove that is present on the flattop surface 118. There is a beveled surface 132, which is reminiscent ofa valve-seat in an automotive cylinder head, and which beveled surfacefunctions as a seat for the valve center 154 as later described herein.There is a shoulder portion 120 which includes an o-ring seal 122annularly disposed thereon. There is also a lower shoulder 134, and askirt portion 128, as well as a smooth bore 312. These elements areshown in FIG. 35 as well, in addition to threaded holes 126 which aredrilled into the seal ring 116 at a band portion 124 which circumscribesthe seal ring. There are a plurality (preferably 4) of holes 126 spacedaround the perimeter of the seal ring 116 which correspond in positionto the slots 104 in the moveable collar 102. The centerlines of thebores of the threaded holes 126 are perpendicular to the centerline ofthe seal ring 116 itself. There is also a flat portion 192 on theunderside of the seal ring which functions as a seat for the spring 186(FIG. 23).

FIG. 36 is a top view of the seal ring 116, showing the respectivepositions of the beveled surface 132, flat top surface 118, o-ring seal130, shoulder 120, and o-ring 120.

FIG. 37 shows the collar/seal ring assembly 136. According to thedisclosure, the seal ring 116 is moveably held in place within themoveable collar 102. This is done by first inserting a spring 140 intoeach of the holes 117 in the underside of the moveable collar 102, andthen securing them in place by placement of spring retaining ring 190(FIG. 23) onto the flat surface 119, such as by using an epoxy resin.This causes the springs to be partly visible in the slots 104 andpartially embedded within the hole 117 between the bottom of themoveable collar and the bottom of the slots 104. A slight forcing of thesprings 140 downward enables one to insert a screw 138 (whose threadsmatch the holes 126 on the outer band of the seal ring 116 into the slotbetween the top of the spring 140 and the top portion of the oval orelongate slot 104. When four screws are inserted into the four slots 104in such fashion, the seal ring 116 may then be placed into the interiorof the moveable collar 102 so that the four screws 138 are engaged inthe threads in the holes 126. A more preferred means for assembly is tofirst assemble o-ring 122 to seal ring 116. Subsequently, the seal ring116 is fitted inside the moveable collar 102, and then the screws 138are inserted through the slots in the moveable collar 102 into threadedholes 126 in 116. Then the springs 140 are inserted into the holes 117and the retainer 190 is fitted into the groove in the moveable collar102. Such a construction yields the arrangement shown in FIG. 37 inwhich the seal ring 116 is held within the moveable collar 102 in suchfashion that motion of the seal ring 116 within the moveable collar 102is permitted in the direction of the centerline, but downward, andagainst the pressure of the springs 140 applied on each of the screws138. Such a motion downwards pushes the seal ring 116 downward,releasing the contact between the O-ring 122 and the beveled edge 114,thus opening up an annular space located at the gap at 142. Upon releaseof downward pressure on the seal ring 116, the force of the springs 140force the seal ring 116 back in an upwards direction, forcing the o-ring122 to sealably engage the beveled edge 114. Also shown in FIG. 37 isthe flat top surface 106, flat top surface 118, o-ring seal 130, beveledsurface 132, and o-ring seal 188 disposed in groove 108. Although thescrews 138 are used to secure the seal ring 116 in its position withinthe moveable collar 102, any other functionally equivalentequatorially-located protrusions from the seal ring are suitable for usein this regard, including without limitation, pins welded into place.

FIG. 38 shows a side view of the collar/seal ring assembly 136, showingthe respective positions of the flat top surface 118, flat top surface106, groove 108, springs 140 and screws 138. The bottom of the assemblyis denoted as B.

FIG. 39 shows an overhead view of the collar/seal ring assembly 136,showing the respective positions of the flat top surface 118, o-ring130, gap 142, flat top surface 106, and beveled surface 132.

FIG. 40A shows a top view of the valve center 154 of the presentdisclosure having a flat top surface 156.

FIG. 40B shows a perspective view of the underside of valve center 154of the present disclosure, showing the stem portion 158 which has athreaded hole 160 at its bottom portion and an o-ring seal 162 disposedannularly about the valve center.

FIG. 40C shows a side perspective view of the valve center element 154,showing the respective positions of the stem 158 and o-ring seal 162 andflat top surface 156.

FIG. 41 shows a side view of the female adapter 701 in its finalassembled form, when all of the components shown in FIG. 23 and aspreviously described herein are contained within the female adaptercover 144 and the female adapter base 164 in their proper designconfiguration. To assemble the female adapter 701, one begins by placingthe female adapter base 164 on a flat surface so that the bottom of thecentral conduit 166B and vapor tube 172 rest on the flat surface. Next,the spring 186 is placed in position around the top portion of thecentral conduit 166T and using the flat surface 171 as a seat. Next, ano-ring 188 is placed in the groove 108 of the collar/seal ring assembly136, and the collar/seal ring assembly is located over the spring. Theassembly 136 is pushed against the pressure of the spring 186 so thatthe top portion of the central conduit 166T enters the underside of theassembly 136 and pushing is continued until the bottom skirt portion (Bin FIG. 38) of the assembly 136 contacts the surface 171, whichsimultaneously engages the o-ring 168 in a sealing contact with thesmooth bore 312 in FIG. 34. Once the bottom portion B has contacted thesurface 171, the hole 160 in the end of the stem of the valve center isthen threaded over the nut (retaining fastener 176, FIG. 25) securely,so that subsequent releasing of the assembly 136 causes the beveled edge132 to contact the o-ring 162 on the valve center 154 in a sealingarrangement. The female adapter cover 144 is then slid over the assembly136 and fastened into position using conventional fasteners threadedthrough the holes 182 (FIG. 25) and into the threaded holes 52 (FIG.29).

FIG. 42 is a bottom view of the assembled female adapter 701 showing therespective positions of the flange 180, bolt holes 182, retainingfastener 176, fastener boss supports 178, valve center 154, centralconduit 166, vapor tube 172, and the outlet portion 187 of the vaportube 172.

FIG. 43 is a top view of the assembled female adapter 701 showing therespective positions of its various elements including the top surface146, flat top surface 118, o-ring 130, flat top 156, gap 142, and flattop surface 106.

FIG. 44 shows a perspective view of the inside top portion of theassembled female adapter 701 showing the respective positions of itsvarious elements including the flat top surface 118, o-ring 130, flattop 156, top surface 146, flat top surface 106, and gap 142.

FIG. 45 shows a perspective view of the inside top portion of theassembled female adapter 701 in which the surface 118 has been presseddownward, against the force of spring 186 (FIG. 23) showing therespective positions of its various elements including the flat topsurface 118, o-ring 130, flat top 156, top surface 146, flat top surface106, gap 142, and opening O which has been caused to exist by virtue ofthe collar/seal ring assembly having been depressed against the force ofspring 186 (FIG. 23).

The construction so described for the female adapter (or remote portionof a fuel transfer coupling according to the disclosure) operates asfollows. A force is applied to the surface 118 of the collar/seal ringassembly, against the pressure of the spring 186. this causes thecollar/seal ring assembly 136 to be moved inside the smooth bore 196 ofthe female adapter cover 144, to open up an opening O through which afuel may flow by virtue of the beveled surface 132 having moved awayfrom the o-ring seal 162 of the valve center 154. The collar/seal ringassembly continues its travel downwards opening up the opening O largerand larger until the bottom portion B of the assembly 136 contacts theraised surface 171. At this point, further pressure on surface 118causes the seal ring 116 to continue moving downwards, against thepressure of springs 140, which opens up the gap 142 by virtue of theo-ring seal 122 no longer being in contact with beveled edge 114. Theopening of the gap 142 opens fluid communication between the outletportion 187 of the vapor tube 172 and the gap 142, through the holes 174and shrouding enclosure 170.

Reference is now made back to the male adapter 700. When the maleadapter 700 is engaged inside the female adapter cover and the two arepressed together by an applied force, a series of events heretoforeunknown in the art occurs. The o-ring 130 on the female adapter 701contacts the flat top surface 48 of the internal housing 18. The appliedforce causes the internal housing 18 to be pressed into the adapter 700,thus opening the gap 7, which provides a fluid communication pathbetween the outlet portion 35 of the vapor tube 20 and the gap 7.Continued applied force causes the assembly 136 to be pushed into thesmooth bore 196 of the female adapter cover 144, thus creating anopening O through which a liquid fuel may flow as was shown in FIG. 45.Continued applied force opens the gap 142 by virtue of the assembly 136bottoming out on the flat surface 171, as described above, thusproviding a fluid communication path between the outlet portion 187 ofthe vapor tube 172 and the gap 142. Under such an arrangement, the gap 7of the male adapter 700 and the gap 142 of the female adapter 701 are influid contact, which also means that the outlet portion 35 of the vaportube 20 and the outlet portion 187 of the vapor tube 172 are now influid communication with one another. During the course of the appliedforce, and more or less simultaneously with the afore said events, theflat top 156 of the valve center 154 pushes on the flat top surface 70of the poppet 10 thus opening space S as described for FIG. 18, thusenabling fluid contact between the space S on the adapter 700 and theopening O (FIG. 45) of the adapter 701. Establishment of a fluidconnection between the opening of space S and the opening O means thatthere is now a fluid connection between the bottom of the centralconduit 166B and the central bore 34 of the male adapter base 4. Thus,insertion of the outer surface of the male adapter cover 2 of thefinished assembly 700 into the bore of the female adapter cover 144 ofthe finished assembly 701 simultaneously causes a fluid connection tooccur between the vapor tubes of each of the coupling counterparts and afluid connection to occur between the central bore 34 of the maleadapter base and the bottom of the central conduit 166B.

According to a preferred form of the disclosure, the central bore 34(FIG. 2) of the assembly 700 is connected by conventional means such asa hose to the inlet pipe through which a fuel tank is normally filled,and the outlet portion 35 of the vapor tube 20 is connected byconventional means such as a hose to the headspace above the fuel in afuel tank, and the assembly 700 is placed in a location at which theorifice through which gasoline is normally added to a vehicle's gas tankis located. The adapter assembly 701 is fitted to the bottom of aportable fuel reservoir (or the outlet of a pump). The outlet portion187 of the vapor tube 172 is connected by conventional means such as ahose to the headspace above the fuel in the fuel reservoir from wherethe fuel to be delivered to the vehicle is stored. The central conduit166B is connected by conventional means such as a hose to the bottom ofthe portable reservoir, to be in contact with a liquid fuel.

Using such provisions, when it is deemed desirable to fill gasoline tothe vehicle, insertion of the end of the assembly 700 into the open endof the assembly 701 causes the above-described series of events tooccur, thus effectively simultaneously, i.e., within about less than 1second, and permits fueling of a vehicle to occur with no loss of vaporto the atmosphere. Also, since the volume of fuel delivered from thestorage tank to the fuel tank on the vehicle is simultaneouslycompensated for by an equal exchange of headspace volume as between thetwo fuel storage vessels, no inhibition of flow is observed. Owing alsoto the nature of the coupling, losses of fuel due to spillage are keptto an absolute minimum, thus reducing fire hazards associated withgasoline spills and effectively eliminating health hazards to persons inthe area by virtue of their not breathing volatile materials such asalkyl lead compounds since no spillages occur. These events are depictedin cross-section in FIGS. 46A-46F. Another way of viewing the eventsassociated with the connection sequence may be broken down in thefollowing steps:

-   -   1. o-ring, 148, engages with adapter cover, 2. Sealing inner        portion of coupler and adapter from outside.    -   2. o-ring, 130, of 136 engages with face, 48, of internal        housing, 18. Sealing inner fluid conduit, 34, from vent cavity,        7.    -   3. Assy, 136, pushes internal housing, 18, and poppet, 10, back        until face, 51, contacts face 40 of body, 4. This opens to vent        cavity, 7.    -   4. Face, 156, of poppet, 158, engages with face, 70, of poppet,        10.    -   5. Poppet, 156, pushes poppet, 10, open allowing fluid/fuel to        flow from 166B to cavity 34.    -   6. Assy, 136, is pushed back until face, 201, of 102 contacts        face, 171, of body, 164.    -   7. Housing, 18, with face, 48, in contact with o-ring, 130,        pushes inner housing, 116, back opening vent cavity, 142?, to        vent port, 172.    -   8. Coupler Assy. continues forward until face, 146, of adapter        cover, 144, contacts the heads of screws, 22, of male adapter.        Coupler is now fully engaged and all ports are fully open.

The occurrences of the above events are described according to onepreferred form of the disclosure. However, it will occur to one ofordinary skill in the art after reading this specification that theevents are controlled by the strengths of the various springs 8, 12,186, and 140 selected. According to a preferred form of the disclosure,the event which is the last to occur is the opening of the gap 142 inthe assembly 136.

The vent disc 14 on the assembly 700 is spring-loaded, as previouslydescribed herein. The purpose of this is to enable ambient air to enterthe fuel tank after a quantity of fuel has been removed from the fueltank by the action of the fuel pump. When the fuel pump removes fuelfrom the fuel tank during its normal operation, a vacuum will bedeveloped within the fuel tank because of the volume of fuel removed.When the coupling of the present disclosure is utilized, once the vacuuminside the fuel tank reaches a sufficient level that the spring 12 canno longer hold the vent disc 14 in its seated position, the vent disc isdrawn away from it seat, and enables ambient air to enter the tank tocompensate for the loss of fuel or other cause of vacuum in the tank,such as a sudden temperature decrease. In addition, the vent disc 14includes a hole 15 in its surface, which acts as a vent to vent out anypressure which may build up in the tank, owing to increases intemperature or other causes.

FIG. 47 shows a perspective view of a fuel containment system comprisinga fuel reservoir 609 having an inlet pipe 611 and containing a liquidfuel and a headspace 613, and further comprising the coupling 700,wherein the vapor tube 20 is in effective fluid contact with theheadspace 613 above the fuel in said fuel reservoir by means of a tube615, and wherein the first end portion 34 of the central bore portion isin effective fluid contact with the inlet pipe 611.

FIG. 48 shows a perspective view of a fuel containment vessel 617comprising an outlet 625 and containing a liquid fuel 621 and aheadspace 619, and further comprising the coupling 701, wherein thevapor tube 172 is in effective fluid contact with the headspace 619above the fuel 621 in said fuel containment vessel by means of a tubing623, and wherein said central conduit portion is in effective fluidcontact with said outlet 625. There is also shown a valve means 627disposed between said outlet 625 and said central conduit portion.

Consideration must be given to the fact that although this disclosurehas been described and disclosed in relation to certain preferredembodiments, obvious equivalent modifications and alterations thereofwill become apparent to one of ordinary skill in this art upon readingand understanding this specification and the claims appended hereto. Thepresent disclosure further includes all possible combinations of thefeatures recited in any one of the various claims appended hereto withthe features recited in any one or more of each of the remaining claims.Accordingly, the presently disclosed disclosure is intended to cover allsuch modifications, alterations, and combinations.

What is claimed is:
 1. A detachable coupling useful for transferring aliquid from a first reservoir to a second reservoir comprising: a) afirst coupling fitting attached to a first reservoir containing a liquidthat is to be transferred to said second reservoir; b) a second couplingfitting attached to said second reservoir, said second coupling fittingbeing complementary to said first coupling fitting; said first couplingfitting and said second coupling fitting each comprising a spring-biasedquasi-cylindrical shell slidably disposed within a cover, said shellseach having a hollow interior and an exterior wall, said exterior wallsbeing configured sufficiently to cause, upon the engagement of saidcoupling fittings with one another, the opening of a first passagethrough which said liquid passes, and the opening of a second passagethat is separate and distinct from said first passage through whichvapor passes through said fittings, the liquid passage being theinterior of said shells and vapor passage being exterior to the walls ofsaid shells, said exterior walls comprising a portion of the boundary ofthe second passage.
 2. A coupling according to claim 1, wherein saidfirst reservoir contains a liquid hydrocarbon.
 3. A coupling accordingto claim 1 wherein said second reservoir is a fuel tank on-board amotorized vehicle, and wherein said first reservoir is a portable,remote reservoir containing a motor fuel.
 4. A coupling according toclaim 1 wherein said second passage is concentrically disposed aboutsaid first passage within said coupling fittings when engaged.
 5. Acoupling according to claim 1 wherein said second coupling fittingincludes a poppet valve.
 6. A coupling according to claim 5 wherein saidpoppet valve includes a spring-loaded vent disc.
 7. A coupling accordingto claim 1 wherein said first coupling fitting and said second couplingfitting are each configured to provide, upon their dis-engagement fromone another, the closing of said first passage and the closing of saidsecond passage.
 8. A coupling according to claim 7 wherein the closingof said first passage and the closing of said second passage occursubstantially simultaneously upon dis-engagement of said couplingfittings from one another.
 9. A detachable coupling useful fortransferring a liquid from a first reservoir to a second reservoircomprising: a) a first coupling fitting attached to a first reservoirsaid first coupling fitting comprising: an adapter cover having a bore;a collar moveably disposed within said bore; a spring-biasedquasi-cylindrical shell slidably disposed within said collar, said shellhaving a hollow interior and an exterior wall, said shell beingconfigured sufficiently to cause, upon application of force against thespring bias of said shell, the opening of a first passage through whichsaid liquid is able to pass through the interior of said shell, and theopening of a second passage between said collar and said exterior wallof said shell that is separate and distinct from said first passage,through which vapor is able to pass within said coupling fitting, saidexterior wall comprising a portion of the boundary of the secondpassage; b) a second coupling fitting that is complementary to saidfirst coupling fitting attached to a second reservoir, said secondcoupling fitting comprising a poppet valve, said second coupling fittingalso being configured to cause a first passage and a second passage thatis separate and distinct from said first passage to exist within saidsecond coupling fitting upon engagement of said coupling fittings withone another.
 10. A coupling according to claim 9 wherein said secondpassage is concentrically disposed about said first passage within saidfirst coupling fitting and said second coupling fitting when engaged.11. A coupling according to claim 9 wherein said poppet valve includes avent disc.
 12. A coupling according to claim 10 wherein said vent discis spring-loaded.
 13. A coupling according to claim 9 wherein said firstcoupling fitting and said second coupling fitting are each configured toprovide, upon their dis-engagement from one another, the closing of saidfirst passage and the closing of said second passage.
 14. A couplingaccording to claim 13 wherein the closing of said first passage and theclosing of said second passage occur substantially simultaneously upondis-engagement of said coupling fittings.